Предмет: Математика, автор: KatrinaZaydullina

Срочно нужен ответ... Можно без решения

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Автор ответа: fattahovalilia986

Ответ:

Пошаговое объяснение:

1/5х+1/20х=18-3

1/4х=15

х=15*4

х=60

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